Questions[courier-imap](server)

I have set up a Postfix mail server which uses Courier in order to provide an SMTP service. On my server there is a user called joe.

I used alias maps to make mail to [email protected] redirect to joe using test: joe in my /etc/aliases. Seeing as there is just one email address and one domain, I don't want to use MySQL to manage aliases as this seems to be a massive overkill for my scenario.

I have two questions...

1. People can send mail to [email protected] as well as [email protected] and it will still go to the account joe. I don't particularly want this, primarily as I am worried people could start spamming system user accounts. Is there a way to disable this?

2. When I use Courrier-IMAP to login to IMAP, is there a way I can login with test or [email protected] as my username rather than joe? I would not like to create a user called test if at all possible.

Thanks :)

I've recently installed courier/postfix with virtual users and domains and i want to move mailboxes from an old server. The problem is that the old server used to use md5 password hashes in the database and current server uses mysql's encrypt(). I've tried to use the following things in the password field with no luck:

{PLAIN-MD5}old_hash
{MD5}old_hash
 $1$old_hash

Courier does not allow me to login. Where could i change a setting or something to allow both courier and postfix to understand old password hashes?

I would like to mitigate POODLE vuln. in my courier-imap server. I know how to do it. I'm really concerned on how it will affect MUA's, especially the older ones. There are still users using Outlook Express 6 in Windows XP. Is there any analysis on which MUA is going to stop working with SSLv3 switched off from server side? Or maybe it's completely safe action?

is it possible to make specific mailboxes (Maildir) read-only? so users can only read, forward and search mails, but don't delete them?

thanks in advance

I have courier-imap currently installed on my CentOS server. I would like to install another imap server (such as dovecot) without uninstalling courier-imap, and then be able to switch between them, that is, so that I can try both and decide which one bets suits my needs, without always uninstalling one of them and installing the other one.

Is that possible? How?